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| From | To | Protocol | Description |
|---|---|---|---|
| read/write + read-only(s) | database | DB protocol | The connection between the read/write and read-only node(s) to the database server to make for performing queries. |
| read/write node | read-only node | XperienCentral File Distribution Service or file synchronization mechanism such as Robocopy or RsyncS. | To synchronize files between all nodes in the clustered environment. |
| Internet | read-only node | HTTP | To handle page requests from the frontend. |
| Intranet + VPN | read/write node | HTTP | Access to the editors' read/write node(s). |
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